It is very plain text, not much to screenshot. I might have fixed this by deactivating all of my "internet accounts" settings, but since I was running Clam AV simultaneously with --remove added, it might have removed something that was causing it, but in the past 20 or so minutes it has gone away.
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Max PetersenMay 15 '13 at 9:14

This is very likely to be related to Facebooks authentication and authorization mechanisms (OAuth and the likes) and probably Ubuntus Webapps. Please note: Because ClamAV's main use is on file/mail servers for Windows desktops it primarily detects Windows viruses and malware. wiki.archlinux.org/index.php/ClamAV
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LiveWireBTMay 15 '13 at 12:05

3 Answers
3

This is a bug in Facebook. Simply delete Facebook from your Online Accounts and you should not get this error message in your browser. A work around has already been released for Saucy and Quantal/Raring's ones are being prepared.

What I did to solve this problem was to delete all of the accounts in
the Online Accounts settings window. This seems to have halted the
popup. I never use desktop integration with online accounts, so I'm
not sure that if I reactivate my Facebook account the popups will
return, but if anyone is having this issue, the cause is most likely
the Ubuntu Desktop/Facebook integration.

If the problem still persists, I would check to see if any other applications are attempting to sign you into Facebook. Here's a short list of other apps which could also cause this problem (apps that require an active connection to Facebook):

I'm hoping this works for more people but, I got a fix for this problem by updating my Windows Live Messenger. Now that Windows Live Messenger and Skype are working together it apparently needs you to update the Windows Live Messenger to incorporate Skype with it. Once I did this it allowed me to log in with Facebook and get all of my Facebook contacts. Hope this helps.